Cannot read property 'getSubs' of undefined.

AngularScript?v=Sn4qt-PnIXwAS34HPmPOJw1QPMEWLxfWx5TyWFOzC2g1:1 TypeError: Cannot read property 'getSubs' of undefined

Note: When i use bundle(Minify) then it gets stuck otherwise works properly

My Code :

Controller.JS Code :

var app;

(function () {

app = angular.module("APICourseModule", []);

})();

app.controller('APICourseController', ['$scope', function ($scope, APICourseService) {

getAll();

function getAll() {

var servCall = APICourseService.getSubs();

servCall.then(function (d) {

$scope.course = d;},

function (error) {console.log('Oops! Something went wrong while fetching the data.')});

}

}]);

Service.js code:-

app.service("APICourseService", ['$http',function ($http) {

this.getSubs = function () {

var url = 'api/Course';

return $http.get(url).then(function (response) {return response.data;});

}

}]);